THE BENCHMARK IN GUITAR DISTORTION The DS-1 Distortion is a true icon in the world of guitar effects. Introduced in 1978, BOSSs first distortion pedal defined a bold new sound, delivering hard-edged attack and smooth sustain thats been a staple of players for generations. The DS-1 is the top-selling BOSS compact pedal ever, and its original, unchanged design continues to inspire the creation of great music everywhere. The classic DS-1 tone is behind the signature sounds of numerous rock legends and is ready to fuel your own signature sound today. Nominal Input Level: -20 dBu Input Impedance: 1 M ohm Nominal Output Level: -20 dBu Output Impedance: 1 k ohm Recommended Load Impedance: 10 k ohms or greater Controls: Pedal switchGAIN knobTONE knobLEVEL knob Indicator: CHECK indicator (Used for indication of check battery) Connectors: INPUT jack: 1/4-inch phone typeOUTPUT jack: 1/4-inch phone typeDC IN jack Power Supply: Carbon-zinc battery (9 V, 6F22) or Alkaline battery (9 V, 6LR61), AC adaptor (PSA series: sold separately) Current Draw: 20 mA